name: Daemon Relocation Spike

# Why: Phase 1 of the Windows update-survival work relocates the terminal
# daemon's file closure out of the install dir so it survives an update. Before
# implementing it in the app, this spike finds the MINIMAL set of packaged files
# that a copied Orca.exe (run as node) needs to start the daemon and drive a
# ConPTY session from a relocated directory, holding no install-dir file locks.
# Runs from the feature branch via push (workflow_dispatch only works on the
# default branch); main is never touched.

on:
  push:
    branches:
      - Jinwoo-H/windows-update-survival
    paths:
      - 'tools/daemon-relocation-spike/**'
      - '.github/workflows/daemon-relocation-spike.yml'
  workflow_dispatch: {}

permissions:
  contents: read

concurrency:
  group: daemon-relocation-spike-${{ github.ref }}
  cancel-in-progress: true

jobs:
  spike:
    name: relocation file-set spike
    runs-on: windows-2022
    timeout-minutes: 40

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          # This job only reads the repo to build/run the spike; it never pushes.
          persist-credentials: false

      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version-file: package.json

      - name: Setup pnpm
        uses: pnpm/action-setup@v6
        with:
          run_install: false

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # Why: cache the unpacked build keyed on the inputs that affect it, so
      # spike-script-only edits skip the ~15 min electron-builder build.
      - name: Cache unpacked build
        id: cache-unpacked
        uses: actions/cache@v4
        with:
          path: dist/win-unpacked
          key: win-unpacked-${{ hashFiles('src/**', 'config/**', 'package.json', 'pnpm-lock.yaml') }}

      - name: Build unpacked app
        if: steps.cache-unpacked.outputs.cache-hit != 'true'
        run: pnpm run build:unpack

      - name: Run relocation spike (all tiers)
        shell: pwsh
        run: |
          New-Item -ItemType Directory -Force artifacts | Out-Null
          $log = "artifacts/spike-output.log"
          $tiers = @('full', 'no-gpu', 'minimal')
          $any = $false
          foreach ($tier in $tiers) {
            "===== TIER: $tier =====" | Tee-Object -FilePath $log -Append
            $work = Join-Path $env:RUNNER_TEMP "spike-$tier"
            # --keep-work-dir so the per-tier daemon stdout/stderr logs survive
            # for the artifact upload (the spike otherwise removes work-dir),
            # which is what diagnoses a tier that fails to reach ready.
            node tools/daemon-relocation-spike/spike.mjs `
              --app-dir dist/win-unpacked `
              --work-dir "$work" `
              --tier $tier `
              --keep-work-dir 2>&1 | Tee-Object -FilePath $log -Append
            if ($LASTEXITCODE -eq 0) { $any = $true }
          }
          if (-not $any) { throw "No tier passed the relocation spike" }

      - name: Upload spike output
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: daemon-relocation-spike-output
          path: |
            artifacts/spike-output.log
            ${{ runner.temp }}/spike-*/**/*.log
          retention-days: 7
          if-no-files-found: warn